Electronic transmission controller?

[d houlton x0710]

Anybody ever worked on a controller for the GM electronic trannies?  
Specifically the 4L60-E?  What about a commercial one?  Is there one
available that's stand-alone and adjustable?  

Were the OEM controllers stand-alone or part of the EFI computer?

Is there an aftermarket efi controller (Haltech, TEC, Wolf, etc?) that
can also control this tranny?


thanks
--Dan
houlster at inficad.com